#pragma once
#include<stdio.h>
#include<stdlib.h>

typedef struct TreeNode
{
	struct TreeNode* left;
	struct TreeNode* right;
	int val;
}BTNode;

BTNode* BuyNode(int val);
BTNode* CreateTree();
void PreOrder(BTNode* root);
void InOrder(BTNode* root);
void PostOrder(BTNode* root);
